Pumping mechanism



y 1 1938. E. c. EKSTROMER 2,123,183

PUMPING MECHAN I SM Filed May 27, 1936 5 Sheets-Sheet l GLAN0% "Q;-

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- IN VEN TOR. fglynkb C. EKSTROMER ATTORNEYS July 12, 1938.

E. C. EKSTROMER PUMPING MECHANISM Filed May 27, 1956 5 Sheets-Sheet 2//v VEN TOR In I EDWARD C. 5K5 reams/a July 12, 1938. E. c. EKSTROMERPUMPING MECHANISM 5 Sheets-Sheet 5 Filed May 27," 1936 M mix.

IN VEN TOE. .EKs TROMER BY 5 J ATTORNEYS EDWARD C Patented JuIylZ 19 38h r n v UNITED STATES PATENT OFFICE PUMPING IVIECHANISM EdwardC. Ekstromer, Los Gatos, GaliL, assignor to Electrolift Corporation, Reno,Nev., a corporation of Nevada 3 Application May 27, L936, Serial No.82,025

12 Claims. (01.103-46) The invention relates to pumping apparatusFigures 13 and 14 are transverse sectional views for wells, inwhichelectric motors are arranged taken, respectively, on the lines.l3-l3 and in a well to drive a pump for elevating fluid from l4l4 ofFigure 8. the well. Referring specifically to the drawings, and par- 11An object of the invention is to provide a ticularly to Figure 1, theinvention isshown aspumping mechanism wherein a plurality ofelecsociated with a well casing In driven into the .trio motors arearranged in co-axial relationship bore ll of an oil well, andthroughwhich extends to each other and to various other units, includtheusual tubing 12 constituting an oil discharge ing a reciprocating pump,with means for posipipe and being suspended from the casing head tivelymaintaining such co-operating relationl3 or other suitable support. Atits lower end 1 ship of all parts as will prevent any relative disthetubing is connected to the barrel ll of a replacement thereof bothrotatively and axially, so ciprocating pump P. as to insure a, properlyalined and balanced con- In Figure 2, the lower end of this pump isildition of the mechanism essential for the latter Ilustrated in detail,to disclose aplunger [5 reto function with maximum emciency. ciprocablein the barrel and connected to a de- 1.;

Another object of the invention is to provide pending and co-axiallyarranged hollow plunger a pumping mechanism as above structurally androd I6 through the medium of the cage ll of functionally characterized,wherein said means the traveling valve l8 of the plunger.

greatly facilitates the operations of assembling The plunger rod l6passes freelythrough the and disassembling the motors and various unitslower and valved head I9 of the barrel I l, and 20 of the mechanism withrespect to an enclosing through a collar 20 to which-is secured a sleevehousing within which all parts are received and 2| containing a liner 22within which the plunger sealed against the ingress of fluid from thewell. works to provide a sealed joint between the two.

A further object of the invention is to provide The lower end of thesleeve 2| is secured by a 1.25 a pumping mechanism wherein the motorsand collar 23 to a stuifing box 24 containinga pack- 25 pumps can belowered into the well as a unit; ing 25 surrounding the plunger rod, anda packwherein a power plant of any desired capacity ing gland, 26associated with the packing as can be obtained without necessitatingenlargeshown in Figure 3.

merit of the casing, and wherein thepower plant From the stuifing box 24the plunger rod ex- 3 can be located below the pump. tends through thetop head 21 of a housing 28 30 With these'and other objects in'view, theinin the form of an open ended and elongated vention consists in thefollowing combinations tubular body of a uniform external diameter. andarrangements of elements as set forth in The top head 21 is providedwith a base flange 23 the following specification and particularlysecured by bolts 30 to a plug 3| threaded tightly pointed out in theappended claims. at 32 into the upper end of the housing 28 so as 35 Inthe accompanying drawings, l to secure the top head 21 rigidly thereto.The

i Figure 1 is a view showing the pumping mechatop head is rigidlyconnected at its upper end to nism embodying this invention installed ina well the lower end of the stuffingbox 24 by a coupling hole forpumping; 33

Figures 2, 3, 4,5, 6, Land 8 are enlarged verlit its lower end theplunger rod is tapered 40 tical longitudinal sectional views of themechaand threaded as shown at 34 and 35, respectively nism, which viewsare end-to-end continuations for coaction with a nut 36 in securing theplunger of each other in the numerical order of the figrod to acrosshead 31 within connecting 'rod ures, starting with the lowerportion of the reguides 38 of arcuate cross-section receiving andciprocating pump in Figure 2 down to the botkeyed at their upper andlower ends as indicated 45 tom end of the housing in Figure8; at 39 and40, respectively, to collars 4| and 42. Figure 9 is a longitudinalsectional view ofpor- Supported on the crosshead .31 and surroundingtions of the mechanism shown in Figures 4 and the plunger rod is aprotecting device D of the 5, and taken at a right angle to the latteriiggeneral characters embodied in my U. S. Patent ures; Nos.2,031,826,.2,034,753, and 2,034,754. Such a 5 Figures 10 and 11 aretransverse sectional views device functions during reciprocation of .thetaken, respectively, on the lines Ill-l0 and plunger rod to collect andeject frornthe housing ll-ll of Figure 4; 28 through the plunger rod allfluids which Figure 12is a transverse sectional view taken might leakthereinto around the plunger rod. I on the line l2-l2 of Figure 6; Theupper collar 4| is secured by a circular series of bolts 48 to asuspension collar 44 threaded externally at 45 into the housing. Securedat their upper ends to the cross head 31 at diametrically opposed pointsand between the guides 38 are connecting rods 48 (Figure 9). Theseconnecting rods provide an operative connection between the crossheadand a mechanism C for converting the rotary motion of electric motors 48into reciprocating motion in order to reciprocate the plunger ii of thepump P.

The mechanism C which is of the general character disclosed in my U. S.Patent No. 1,799,458, issued April '1, 1931, is specifically the same asthat disclosed and claimed in my copending application Serial No.95,556, filed August 12, 1936. For the purpose of this description, itwill sufllce to state that this mechanism comprises a shuttle member 49to the upper end of which the connecting rods 45 are secured. Theshuttle member is adapted to be reciprocated along a double threadedscrew shaft 59, as the latter is ven continuously in one direction fromthe electric motor 48 through a suitable epicyclic reduction gearingmechanism M interposed between the motors and shaft within the housingas shown in Figure '2. Suitable clutches 5i- -5i and 52-52 are caused tobe alternately engaged and disengaged to render right and left hand nuts53 and 54, respectively, alternately operable to feed the shuttle memberbetween the upper and lower bearings 55 and 55 in which the upper andlower ends of the shaft are journaled as shown, respectively, in Figures4 and 6.

The shuttle member 49 has fixed thereto at diametrically opposedlocations longitudinal keys 51-51 which slide in longitudinal grooves58-58 formed in the housing 28 to extend from its upper end to a pointadjacent its lower end, as shown in Figures 4, 5, 6, 7 and 8. The keysand grooves co-act to confine the shuttle member to movement axially inthe housing.

The upper bearing 55 which is secured to the collar 42 by a threadedconnection 59, and is locked to the collar by threaded fastening mem-'bers 58, is confined against rotation relative to the housing by headsii on the members which are of rectangular form and are 'slidablyreceived in the grooves 58. Likewise, the lower bearing 58 is confinedagainst rotation relative to the housing 28 by the rectangular heads 52of fastening members 58 which are slidably received in the grooves 58and serve to lock this bearing member to a collar 54. The collar 64 isrigidly connected to a tube 85 enclosing the splined connection 88between the lower end of the screw shaft 58 and the upper end of thedriven shaft 51 of the epicyclic gearing mechanism M enclosed within asuitable cylindrical casing 88. At the lower end of the casing 88 thedrive shaft 69 of the mechanism M has a splined connection 19 with therotor shaft 1i of the uppermost electric motor 48.

The upper end of the casing 68 is rigidly connected to the tube 55through an interposed collar 12, and the lower end of the casing isconnected to the upper end bell 18 of the uppermost motor 48 through themedium of a collar 14, a tube 15, a second collar 15 abutting the bell13, and a ring 11 threaded internally to have oppositely threadedconnection with the latter collar and the bell. Fastening members 18lock the ring to the collar 15 and to the bell 13 at the abutting facesthereof, and these members are provided with rectangular heads 18slidably received in the grooves 58.

As will be readily apparent from Figures '7 and 8. the motors 48, ofwhich there may be any desired number to provide a predetermined totalhorsepower, are arranged end to end in coaxial relationship. Thespeciflc form of fastening means including the ring 11 and fasteningmembers 18 having heads 18 projecting into the grooves 58, is providedat the confronting ends of the motors and also at the lower end bell 89of the lowermost motor, as shown in Figure 8.

This fastening means except for the functioningof the heads 19 of themembers 18 in providing keys which co-act with the grooves 58 to confinethe stators of the several motors against rotation relative to thehousing, form no part of the present invention, but are described andclaimed in my copending application for patent on Multiple motor unit,Serial No. 95,557, filed August 12, 1936. A multiple motor unit of thesame general character is disclosed in my U. 8. Patent No. 1,960,484 inconjunction with reduction gearing and a motion converting mechanism,all in a submerged pumping assembly. x

The ring 11 at the lower end bell of the lowermost motor 48 connects thelatter to a sustaining collar 8| through an interposed flange 82,

the collar 8| having a threaded connection 83 interiorly of the housing28, and receiving a circular series of bolts 84 threaded into theflange, all as clearly shown in Figure 8.

Threaded into the lower end of the housing 28 is a plug to which issecured by a circular series of bolts 86, a cap 81 providing a sealingclosure for the lower endof the housing.

In assembling the mechanism, the several units which are intended to beenclosed by the housing 28 are rigidly connected together, as abovedescribed. With the bottom cap 81 removed from the housing, and the plug85 in place, the rigid assembly of the several units, 1. e., electricmotors 48, gearing mechanism M, motion converting mechanism 41,crosshead 81, plunger rod It, with the suspension collar 44 applied tothe rod, are inserted motors foremost, into the upper end of thehousing. The heads 18 and 62, the keys 51, and theheads 6|, are receivedin the grooves 58 as the associated parts are inserted inthe housing.When the flange 82 abuts the sustaining collar 8i, the bolts 84 arescrewed home. The suspension collar 44 can now be screwed tightly intothe housing 28 and the bolts 43 then screwed home. Following this thetop head 21 and bottom cap 81 can be applied to the housing as shown inFigures 3 and 8, respectively. v

with the aforestated rigid assembly of units thus supported in thehousing 28, the heads 19, 82, and GI co-act to positively prevent theassembly from rotating relative to the housing, as likewise do the keys51, which latter in addition are free to slide in the grooves 58 so asto co-act therewith in confining the shuttle member 49 to motion axiallyin the housing.

The collars 44 and 8| co-act with the housing 28 to confine theaforestated rigid assembly of units against any and all axialdisplacement relative to the housing, so that the units will bemaintained in proper co-operative relationship to insure the alined andbalanced condition of the mechanism necessary for maximum efliciency inoperation. Furthermore, the manner in which the assembly of units isstructurally and functionally associated with the housing enables thelatter to be effectively sealed against the ingress of well fluid, whileproviding for the application 75 to the housing; collars secured in thehousing of theassembly to. and its removal housing with ease anddispatch.

From the foregoing description. it will be manitest that the entiremechanism. including the pump P, can be readily lowered into and removedfrom a well as a unit, and that when operating it is wholly suspended inthe bore hole by the tubing through which the oil israised from thewell. a C I What is claimed is: 1. In pumping mechanism of the classdescribed, a tubular housing adapted to be suspended Irom its upper endin a well hole; a rigid irom. the

F assembly of operatively connected units insertable into an end of thehousing and including a co-axial series of motors and power transferringmechanism having a member to which reciprocating movement istransmitted; co-acting means on the housing and units of said assemblyfor confining the latter against rotation relative to the housing; andmeans in the housing co-acting with the uppermost and lowermost units ofthe assembly to secure the assembly against axial displacement in thehousing.

2. In pumping mechanism of the class described. a tubular housingadapted to be suspended from its upper end in a well hole, and

-internally grooved longitudinally; a rigid assembly of operativelyconnected units insertable into an end of the housing and including aco-axial series of motors and power transferring mechanism having amember to which reciprocating movement is transmitted; keying meansprojecting from units of said assembly at intervals along the lengththereof, into the groove of the housing to confine the assembly againstrotation relative to the housing; and means in the housing coacting withthe uppermost and lowermost units of the assembly to secure the latteragainst axial displacement in the housing.

-3. In pumping mechanism 'of the class de*- scribed, a tubular housingadapted to be suspended from its upper end in a well hole, andinternally grooved longitudinally; a rigid assembly of operativelyconnected units insertable into an end of the housing and including acoaxial series of motors and a power transferring mechanism having amember to which reciprocating movement is transmitted; keying meansprojectingfrom units of said assembly at intervals along the lengththereof, into the groove of the housing to confine the assembly againstrotation relative to the housing; collars secured in the housing 1 aboveandbelow the uppermost and lowermost units of said assembly; and meansco-acting with the collars and said uppermost and lowermost units toconfine said assembly against axial displacement relative to thehousing.

4. In pumping mechanism of the class described, a tubular housingadapted to be suspended from its upper end in a well hole, andinternally grooved longitudinally; a rigid assembly of operativelyconnected units insertable into i an end of the housing and including acoaxial series of motors and power transferring mechanism having amember to which reciprocating movement is transmitted; keying meansprojecting from units of said assembly at intervals along the lengththereof, into the groove of the housing to confine the assembly againstrotation relative above and below the uppermost and lowermost unitsmfsaid assembly; and bolts in said collars threadedly connecting the saiduppermost and lowermost units to the collars for coaction thereceivewithin confining the assembly against axial displacement relative to thehousing.

5. In pumping mechanism of the class described, an open-ended tubularhousing adapted to be suspended in a well hole, and being internallygrooved longitudinally; an assembly oi operatively connected unitsincluding a rotary prime mover and a reciprocating power transmost unitsto confine said assembly against axial displacementrelative to thehousing; a removable closure sealing the lower end of the housing; and aremovable top head adaptedto rea plunger rod and closing the upper endof the housing.

6. In pumping mechanism of the class described. a tubular housingadapted to be suspended from its upper end in a well hole, andinternally grooved longitudinally; a rigid assembly of operativelyconnected units insertable into an end of the housing and including aco-axial series of motors and mechanism having a shuttle driven therebyand provided with a key reciprocable in said groove of the housing toconfine the shuttle to movement axially in the housing; keying meansprojecting from units of said assembly into the groove of the housing toconfine such units against rotation relative to the housing; and meansco-acting with the housing and with the uppermost and lowermost units ofsaid assembly to confine the latter against axial displacementrelativeto the housing.

7. In pumping mechanism of the class described, a tubular housingadapted to be suspended from its upper end in a well hole; and

' internally grooved longitudinally; a rigid assem- 'said assembly intothe grooves of the housing to confine such units against rotationrelative to the housing; collars secured in the housing above and belowthe uppermost and lowermost units of said assembly and bolts in the saidcollar threadedly connecting said uppermost and lowermost units tothecollars for co-action therewith in confining the assembly againstaxial displacement relative to the housing.

8. In pumping mechanism of the class described, a tubular housingadapted to be supported in a well hole; a rigid assembly of operativelyconnected power and power-transferring units insertable into an end ofthe housing; means on the housing and units of the assembly forconfining the assembly against rotation relative to the housing whilerendering the assembly free to be inserted into and removed from thehousing in a. longitudinal direction relative to the latter; and meansco-acting with the housing and assembly to removably secure the assemblyin the housing against relative displacement axially thereof.

scribed, a tubular housing adapted to be supported in a well hole andbeing longitudinally grooved internally; a rigid assembly of operativelyconnected power and power-transferring units insertable into an end ofthe housing; keying means on units of said assembly projecting into thehousing groove for co-action therewith in confining the assembly againstrotation relative to the housing while rendering the assembly free to beinserted into and removed from the housing in a longitudinal directionrelative to the latter; and means co-actlng with the uppermost andlowermost units of said assembly to removably secure the assembly in thehousing against relative displacement axially thereof.

10. In pumping mechanism of the class described, a tubular housingadapted to be supported in a well hole and being longitudinally groovedinternally; a rigid assembly of operatively connected power andpower-transferring units insertable into an end. of the housing; keyingmeans on units of said assembly projecting into the housing groove forcoaction therewith in confining the assembly against rotation relativeto the housing while rendering the assembly free to be inserted into andremoved from the housing in a longitudinal direction relative to thelatter; collars fixed in the housing above and below the uppermost andlowermost units of said assembly; and bolts in the collars co-actingwith said uppermost and lowermost units to confine the assembly in thehousing against axial displacement relatively thereto.

11. In pumping mechanism of the class described, a tubular housingadapted to be sus-- pended in a well. hole, and being internally groovedlongitudinally; an assembly of operatively connected units including arotary prime mover unit and a power transferring unit having areciprocating member portions of which work in said groove of thehousing to confine said member to reciprocating motion therein; keyingmeans projecting from the prime mover unit into the housing groove forcoaction therewith in confining such unit against rotation relative tothe housing; and means co-acting with the housing and the assembly tosecure the latter against axial displacement in the housing.

12. In pumping mechanism of the class described, a tubular housingadapted to be suspended in a well hole, and being internally groovedlongitudinally; an assembly of operatively connected units including arotary prime mover unit and a power transferring unit having areciprocating shuttle member; elongated keying means projecting from theshuttle member and working in the housing groove to confine the shuttlemember to reciprocating motion in the housing; keys projecting from theprime mover unit of the assembly into the housing groove for co-actiontherewith in confining such unit against rotation relative to thehousing; and means co-acting with'the housing and assembly to confinethe latter against axial displacement in the housing.

EDWARD C. EKSTROMER.

